Electrochemical studies and Thermodynamic Parameters of tris(2,2'-bipyridyl) ruthenium (II) in nonaqueous Solutions

Abstract

In this study Ruthenium (II) tris (2, 2'-bipyridyl) complex in nonaqueous solution was studied by cyclic voltammetry and also its kinetic parameters were calculated. The redox reaction of ruthenium (II) trisbipyridyl complex is totally quasi-reversible and it can be described as a diffusion-controlled process. As a result of the redox reaction, the kinetic parameters of the electrode process such as diffusion coefficient (D), and heterogeneous rate constant (ks) were calculated. In addition, the different thermodynamic parameters such as standard free energy (ΔG#), enthalpy change (ΔH#), and entropy change (ΔS#) were determined and enthalpy change revealed the exothermic behavior of the electrode reaction. Both oxidation and reduction onset potentials of the ruthenium (II) trisbipyridyl complex was determined under the same experimental conditions to estimate the low ionization potential and electron affinity. The electrochemical and optical band gaps of the ruthenium (II) complex were compared.

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Acknowledgments

This research work was supported by the Innovation project (H 2.5.1) financed by Mongolian Foundation for Science and Technology. We would like to acknowledge all the members of Center for Nanoscience and Nanotechnology for their aid and kind cooperation.

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Correspondence to Gendensuren Bolormaa.

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Bolormaa, G., Battulga, M., Naranbileg, B. et al. Electrochemical studies and Thermodynamic Parameters of tris(2,2'-bipyridyl) ruthenium (II) in nonaqueous Solutions. MRS Online Proceedings Library 1390, 00542 (2012). https://doi.org/10.1557/opl.2012.542

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